摘要
在常温磷化的条件下,通过向磷化液中加入纳米SiO2,在低碳钢表面制备磷化膜。通过硫酸铜点滴试验以及腐蚀电化学测试等手段,研究磷化液中加入纳米SiO2对磷化膜结构和性能的影响。结果表明,在本试验条件下,磷化膜的膜厚随着纳米SiO2浓度的增加而增加。当纳米SiO2的加入量为1 g/L时,膜厚为7.81μm,磷化膜耐蚀性能最好,耐硫酸铜点滴腐蚀时间大于115 s,3.5%NaCl溶液中的腐蚀电流密度为0.931μA/cm2,缓蚀效率为97.9%。
At common temperature,the phosphate coating on mild steel surface was prepared by adding nano-SiO2 into phosphating solution.The influence of nano-SiO2 on structure and performance of the phosphate coating was studied by electrochemical testing.The results showed that the coating thickness increased with increasing the nano-SiO2 concentration.When the nano-SiO2 concentration was 1 g/L,the thickness of phosphate coating was 7.81 μm,the corrosion resisting time of the coating evaluated by CuSO4 dripping test was more than 115 s,and the corrosion current density of the phosphating sample was 0.931 μA/cm^2 in 3.5% NaCl solution,the corrosion inhibition efficiency reached 97.9%.
出处
《腐蚀与防护》
CAS
北大核心
2010年第6期425-427,共3页
Corrosion & Protection
基金
国家自然科学基金(NO.50571059,50615024)
2007教育部新世纪优秀人才支持计划项目(NCET-07-0536)资助
关键词
磷化
低碳钢
纳米SIO2
腐蚀
表面处理
phosphating
mild steel
nano-SiO2
corrosion
surface treatment
